86 
Report on the Agricultural Implements at 
bottom of the cart or receptacle is lunged in three divisions. When it is desir- 
able to discharge the load, the driver operates on leverage within reach of bis 
seat, whereby the divisions are let down, and three large openings made, 
through which the soil finds a vent. 
Messrs. Rhodes and Waters, Elyria, Ohio, have patented a Post Hole-digger, 
which has some advantage over the ordinary auger borers, and will answer 
well in ordinary soils, sands and gravels. The jury submitted this implement 
to rather a severe test, viz., digging a hole on a gravel road outside the Hall ; 
which was done in a very satisfactory manner. The digger consists of two 
gouge-shaped blades, attached to two jointed handles. When the soil is being 
disturbed, these handles are brought close together. The digger is thrown into 
the soil as a chisel-bar or drill, and when the soil is loosened the handles are 
spread out, which brings the blades together, enabling them to hold a con- 
siderable quantity of soil, which is then elevated and removed. The whole- 
sale price of this implement is about 3^ dollars. 
In a country where land is so often being cleared, Stump Extractors are 
necessarily of great utility. Several different forms were shown ; that which 
I select for description is Davis's Rock and Stump Extractor, shown by A. C. 
Cotton, Vineland, New Jersey. Inasmuch as the construction of lever and 
ratchet-wheel renders slipping impossible, every inch raised is secured. The 
apparatus consists of a ratchet-wheel and sproggle-wheel, on the same axle, 
suspended by a strong iron link, to which the short arm of a long lever is 
hung ; a pin across this link forms the fulcrum of the lever ; the top of the 
link is held by a chain to the junction of three teagle poles ; a loop at the end 
of the lever catches in the teeth of the ratchet and allows of the latter being 
moved by the lever; consequently the chain held by the sproggle-wheel, to 
which the tree, root, or stone is attached, is also moved, so by degrees the 
obstacle is drawn. It is quite evident that the power of such a leverage is 
very great, and only limited by the strength of the apparatus ; and it is said 
that one man can easily raise a weight of ten tons. The practice is to allow 
the roots to remain for a sufficient time in the ground after the trees have 
been cut, to rot the smaller rootlets. Then the apparatus is fixed above the 
root, and the hooks of the chain inserted on opposite sides of the stump, and 
the raising process can proceed. One man works the lever, whilst the other 
is ready to assist the process by cutting through stubborn rootlets. The retail 
price of the large-sized machines, capable of raising weight or overcoming a 
resistance of ten tons, is 40 dollars, but the iron work, which is all that is 
required, could doubtless be obtained at a much reduced rate. 
Amongst Miscellaneous exhibits, I must draw attention to the Automatic 
Incubator, shown by S. A. Day and Company, of Baltimore, which is highly 
ingenious, and apparently efficacious. It consists of a large square box, heated 
from under the centre by a coal-oil lamp ; above the lamp is a heater which acts 
upon water in a vat, and the hot air circulates through the box, which has shelves 
arranged for the eggs. The object is always to secure an even temperature, 
consequently the lamp requires manipulation ; it must be either turned up 
or down, according as the temperature advances or recedes from 103°. This 
is effected by the unequal expansion of a bar composed of india-rubber and tin. 
As the temperature rises, the bar moves by the expansion of the rubber, and acts 
on compound levers, which act upon the wick-regulator. By another equally 
clever adjustment, the contraction of the bar is made to act on a watch-spring, 
which rings a bell in the event of the lamp going out, and thus attention 
is called to the requirements of the incubator. 
Professor A. Corbett, of Hicksville, Long Island, is the inventor of a very 
simple Incubator and Artificial Mother combined. The apparatus consists of 
a cask or cylinder of wood, near the bottom of which is a door for convenient 
access ; when let down, this door, which is hinged to the bottom of the cylinder, 
